I don't have access to the technical side of things. Even if I did, I don't have the knowledge to do anything about it. I just keep the photo sections organized and make sure the posting guidelines are followed.
http://www.joedios.com/forum/showthread.php?t=4634
Once this problem is solved, if it doesn't automatically fix the thumbnails, I can manually update them for everyone. Until then there's nothing I can personally do about it.